The Royal Asscher Diamond Company is a Dutch company founded in 1854 by the Asscher family of gemcutters. The company is responsible for cutting some of the most famous diamonds in the world including
The Asscher Diamond Factory former headquarters on the Tolstraat 127 in Amsterdam
Joseph Asscher splitting the Cullinian diamond
Excelsior Diamond
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The Excelsior Diamond is a gem-quality diamond, and was the largest known diamond in the world from the time of its discovery in 1893 until 1905, when the Cullinan Diamond was found. It was found on J
Royal Asscher Diamond Company
…The Asscher family also patented the Trilliant cut in the 1970s. In 1903, at 997 carats (199.4 g), the Excelsior diamond was the largest diamond found, to date. The gem required expert handling to be properly carved: inclusions within the rough diamond prevented it from…
Depiction of the Excelsior in Precious Stones and Gems (1898) by Edwin W. Streeter
Photo depicting "...the exact size." in Mark Twain's 1897 travelogue, "Following the Equator"